100KW gas boiler for domestic install!

[infromthecold]

Hi All

New member and first post.

I'm not in the trade so hoping folks on here with all the knowledge can assist.

Got 5 bed detached Victorian house that has no central heating so in process of getting boiler and rads spec'd.

Have been told that will need a 100kw boiler and that this boiler will need a a larger gas supply pipe even though there is 22mm already.
Was hoping for a combi as there is only one bathroom with shower over bath.
Room sizes (in metres) are listed below, All double glazed with solid walls but I calculate heat requirement at 25KW so where the 100KW comes from I have no idea hence this post. All the on-line calculators I have used are all coming in around 25 - 26 KW for heating.

Hope someone can help or offer advice. I would think 100KW is large enough for a school or factory or a 5 bed with 14/15 rads.

Cheers

Room H, W, D
Living Room 3.1, 5.49, 4.88
Sitting Room 3.1, 4.22, 3.91
Dining Room 3.1, 3.23, 3.12
Kitchen 3.1, 5.18, 4.47
Bed 1 3.1, 4.42, 3.2
Bed 2 3.1, 4.42, 2.29
Bed 3 3.1, 7.21, 3.56
Bed 4 3.1, 3.86, 3.23
Bed 5 3.1, 4.27, 4.11
Bath 3.1, 4.42, 3

 

[vern]

Assuming U6 meter STOP YOUR GAS METER WILL ONLY PASS 62 kw absolute max, fires, cookers etc will take this away from the boiler available kw rating too, not even worked it out but would be very surprised if a 30 or 40 kw boiler did not suit you.

 

[Reltub]

Get a 40kw combi

 

[REDSAW]

what has the heating installer quoted for the requirement?

 

[Billy Bob Bob]

wheres that piccie of a 100 kw combi on the wall in a 3 bed house LOL

 

[Billy Bob Bob]

SURE ITS NOT A 100,000 BTU boiler you have been told to get?

 

[Rickster123]

Vaillant ecotec plus 837. May well require a 28mm gas run depending on distance.

You sure you want a combi tho??

 

[vern]

SURE ITS NOT A 100,000 BTU boiler you have been told to get?

Yep more like it Mark good thinking, maybe the installer still works in "old money"

 

[infromthecold]

thanks for all replies so far.
I asked if it was BTU but was told no it is 100KW!

Was hoping combi would suit but not against system boiler with unvented cylinder.

Main objectives are not to get fleeced, not to have supply pipe changed or have something that takes have the gas piped into town

 

[Rickster123]

System boiler and unvented. Every day! You won't regret it.